.stuxiugai{
    width: 740px;
    height: 539px;
    background: white;
    position: absolute;
    top: 43px;
    text-align: left;
    overflow:scroll
}
.stuxg{
    width: 400px;
    height: 300px;
    background: rgb(238, 236, 236);
    margin-top: 50px;
    margin-left: 150px;
    border-radius: 5px;
}
.stuhead{
    width: 100%;
    height: 40px;
    background: rgba(109, 173, 226, 0.877);
    line-height: 40px;
    text-align: center;
    color: white;
}
.stuxg ul{
    margin-top: 30px;
    margin-left: 50px;
}
.stuxg  input{
    width: 300px;
    height: 30px;
    margin-bottom: 30px;
    outline: none;
    border-radius: 5px;
}
.stuxg  button{
    width: 100px;
    height: 30px;
    background: rgb(96, 96, 241);
    margin-left: 90px;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    outline: none;
}
.stuxs{
    width: 300px;
    height: 50px;
    margin-left: 200px;
    margin-top: 200px;
    color: red;
}